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              <div class="title">
    <h3>PLASM.it - 2017</h3>
    <h1>DISTANCES</h1>
    <h3>Connections and differences</h3>
  </div>
  <div class="more-pens">
    <a target="_blank" href="https://codepen.io/plasm/" class="white-mode">VIEW OTHER PENS</a>
    <a target="_blank" href="https://codepen.io/collection/nZpPbz/" class="white-mode">VIEW OTHER PARTICLES</a>
  </div>
            
          
!
            
              @import url('https://fonts.googleapis.com/css?family=Montserrat:200,300,400,600')
.more-pens
  position: fixed
  left: 20px
  bottom: 20px
  z-index: 10
  font-family: "Montserrat"
  font-size: 12px

a.white-mode, a.white-mode:link, a.white-mode:visited, a.white-mode:active
  font-family: "Montserrat"
  font-size: 12px
  text-decoration: none
  background: #212121
  padding: 4px 8px
  color: #f7f7f7
  &:hover
    background: #edf3f8
    color: #212121

body
  margin: 0
  padding: 0
  overflow: hidden
  width: 100%
  height: 100%
  background: #000000


.title
  z-index: 10
  position: absolute
  left: 50%
  top: 50%
  transform: translateX(-50%) translateY(-50%)
  font-family: "Montserrat"
  text-align: center
  width: 100%
  h1
    position: relative
    color: #EEEEEE
    font-weight: 600
    font-size: 60px
    padding: 0
    margin: 0
    line-height: 1
    text-shadow: 0 0 30px #000155

    span
      font-weight: 600
      padding: 0
      margin: 0
      color: #BBB

  h3
    font-weight: 200
    font-size: 20px
    padding: 0
    margin: 0
    line-height: 1
    color: #EEEEEE
    letter-spacing: 2px
    text-shadow: 0 0 30px #000155

            
          
!
            
              let max_particles    = 150;
let particles        = [];
let frequency        = 200;

// Popolate particles
popolate(max_particles);

var tela = document.createElement('canvas');
    tela.width = $(window).width();
    tela.height = $(window).height();
    $("body").append(tela);

var canvas = tela.getContext('2d');

class Particle{
  constructor(canvas){
    let colors = ["#E5493F","#55C1FF","#26B9A0", "#5A52FF"]
    // let colors = ["#feea00","#a9df85","#5dc0ad", "#ff9a00","#fa3f20"]
    let types  = ["full","fill","empty","square","square-in-circle"]
    this.random = Math.random()
    this.canvas = canvas;

    this.lineWidth = 0.2 + (2.8*this.random);

    this.speed = 2 + Math.random() * 3

    this.progress = 0;
    this.progress_inc = this.random > 0.5 ? this.random*(this.speed*1.5) : this.random*-(this.speed*1.5);

    this.vx = (Math.random() * this.speed) - (Math.random() * this.speed)
    this.vy = (Math.random() * this.speed) - (Math.random() * this.speed)
    this.radius = 10 + Math.round(Math.random() * 50)
    this.w = $(window).width()
    this.h = $(window).height()
    this.x = (this.w-this.radius)/2
    this.y = (this.h-this.radius)/2


    this.radius = 1 + (8*this.random)
    this.type  = types[this.randomIntFromInterval(0,types.length-1)];
    this.color = colors[this.randomIntFromInterval(0,colors.length-1)];
  }

  getCoordinates(){
    return {
      x: this.x,
      y: this.y
    }
  }

  randomIntFromInterval(min,max){
      return Math.floor(Math.random()*(max-min+1)+min);
  }

  render(){
    // Create arc
    let color = this.color;
    switch(this.type){
      case "square":
        this.drawRotatedRect(this.x, this.y, this.radius*2, this.radius*2, this.progress, color)
      break;
      case "square-in-circle":
        this.drawRotatedRect(this.x, this.y, this.radius*2, this.radius*2, this.progress, color)
        this.createArcEmpty(this.radius+this.lineWidth*3, this.lineWidth, color)
      break;
      case "full":
        this.createArcFill(this.radius, color)
        this.createArcEmpty(this.radius+this.lineWidth, this.lineWidth/2, color)
      break;
      case "fill":
        this.createArcFill(this.radius, color)
      break;
      case "empty":
        this.createArcEmpty(this.radius, this.lineWidth, color)
      break;
    }
  }

  createArcFill(radius, color){
    this.canvas.beginPath();
    this.canvas.arc(this.x, this.y, radius/1.5, 0, 2 * Math.PI);
    this.canvas.fillStyle = color;
    this.canvas.fill();
    this.canvas.closePath();
  }

  createArcEmpty(radius, lineWidth, color){
    this.canvas.beginPath();
    this.canvas.arc(this.x, this.y, radius, 0, 2 * Math.PI);
    this.canvas.lineWidth = lineWidth;
    this.canvas.strokeStyle = color;
    this.canvas.stroke();
    this.canvas.closePath();
  }

  drawRotatedRect(x,y,width,height,degrees, color){
    this.canvas.save();
    this.canvas.beginPath();
    this.canvas.translate( (x-this.radius)+width/2, (y-this.radius)+height/2 );
    this.canvas.rotate(degrees*Math.PI/180);
    this.canvas.rect( -(width/2), -(height/2), width,height);
    this.canvas.fillStyle=color;
    this.canvas.fill();
    this.canvas.restore();
  }


  move(){
    this.progress += this.progress_inc
    let diff = this.radius
    switch(this.type){
      case "full":
        diff = this.radius + this.lineWidth*2
      break;
      case "square-in-circle":
        diff = this.radius + this.lineWidth*3
      break;
      case "empty":
        diff = this.radius + this.lineWidth
      break;
    }

    this.x = this.x + this.vx
    this.y = this.y + this.vy

    if(this.x < diff || this.x > this.w - diff){
      this.vx = -this.vx
    }
    if(this.y < diff || this.y > this.h - diff){
      this.vy = -this.vy
    }
    this.render()
    return true
  }

  calculateDistance(v1, v2){
    let x = Math.abs(v1.x - v2.x);
    let y = Math.abs(v1.y - v2.y);
    return Math.sqrt((x * x) + (y * y));
  }
}

/*
 * Function to clear layer canvas
 * @num:number number of particles
 */
function popolate(num){
  for (var i = 0; i < num; i++) {
   setTimeout(
     function(x){
       return function(){
         // Add particle
         particles.push(new Particle(canvas))
       };
     }(i)
     ,frequency*i);
  }
  return particles.length
 }

function clear(){
  canvas.fillStyle='#101018';
  canvas.fillRect(0, 0, tela.width, tela.height);
}

function calculateDistance(v1, v2){
  let x = Math.abs(v1.x - v2.x);
  let y = Math.abs(v1.y - v2.y);
  return Math.sqrt((x * x) + (y * y));
}

function connection(){
  let old_element = null
  $.each(particles, function(i, element){
    if(i> 0 && (i%3==0 || i%7==0)){
      let box1 = old_element.getCoordinates()
      let box2 = element.getCoordinates()
      canvas.beginPath();
      canvas.moveTo(box1.x,box1.y);
      canvas.lineTo(box2.x,box2.y);
      canvas.lineWidth = 0.8;
      canvas.strokeStyle="#32323C";
      if(i%7==0){
        //canvas.strokeStyle="#3f47ff";
      }
      canvas.stroke();
      canvas.closePath();
    }

    old_element = element
  })
}

/*
 * Function to update particles in canvas
 */
function update(){
  clear();
  connection()
  particles = particles.filter(function(p) { return p.move() })
  requestAnimationFrame(update.bind(this))
}

update()

            
          
!
999px
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